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Instruction Sheet
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Ford Racing developed the Z331P crate engine to be used in high performance applications where a high reving 500+ horsepower engine is needed. The engine is perfect for vintage racing or open track Mustangs that use a traditional 289 or 302 type small block Ford. The engine is built around a BOSS 302 8.2" deck block with a short 3.100 stroke and roller camshaft. The Z331 delivers performance thats reminiscent of the Trans Am days.


515 horsepower @ 7,100 rpm

415 lb.ft. torque @ 5,300 rpm


  • Engine Type:  302 based small block ford
  • Displacement (cu in):  331
  • Bore x stroke (in):  4.125" bore x 3.100" stroke
  • Block: Boss 302 8.2" deck
  • Crankshaft: SCAT Forged Steel
  • Connecting Rods:  SCAT forged steel H-beam connecting rods
  • Pistons: Forged Mahle w/ floating wrist pins
  • Camshaft Type:  Solid Roller
  • Camshaft Lift (in): .525"
  • Camshaft Duration (@.050 in):  258/266
  • Cylinder Heads (p/n M-6049-Z304P):  Ford Racing Aluminum Z Cylinder Heads
  • Valve size (in):  2.08 intake 1.60 exhaust
  • Compression Ratio:  11.9:1 (nominal)
  • Rocker Arms: Roller Rockers
  • Rocker Arm Ratio:  1.65:1
  • Vibration Damper – Ford Racing SFI Approved
  • Valve covers: Ford Racing "BOSS" cast aluminum polished finish
  • Oil pan: high performance rear sump 7 quart capacity with windage tray / scraper
  • Water pump: Edelbrock hi-performance
  • Distributor: not included
  • Recommended Fuel:  Premium Leaded 110 octane minimum
  • Ignition timing:  32 degrees total
  • Maximum recommended rpm:  7,000
  • Balanced: Internal.  Use neutral balance flywheel
  • Engine power rating based on long tube headers, Parker Funnelweb Intake w/ 750 Demon carb and 1" carb spacer
  • Depending on your application, a different timing cover, water pump, performance oil pan and pickup may be required. See installation notes
  • Race Application - No Warranty INSTALLATION NOTES: See engine installation and tuning tips. Some or all of the following items may need to be changed from your original engine or modified for proper installation:
  • A different performance oil pan and pickup may be required for your application. Call the Techline at (800) FORD788 for more information.
  • The timing chain cover will work with most regular rotation water pumps.
  • Fuel pump eccentric M-6287-B302 installed, allows use of mechanical fuel pump
  • A standard rotation water pump is installed on the engine. Other applications may require different water pumps and timing chain covers
  • Intake gasket Cometic IR340SP4060KF recommended
  • Firing order 1-3-7-2-6-5-4-8.
  • Built with current available parts. Photo and specs may vary.
  • Shipping weight approximately 465 lbs See Also...
  • Crate Engine Build-Up
  • Crate Engine Warranty
  • Engine Tips & Specs
  • Crate Engine Catalog
Part Type
Engine: Complete Engines
Warranty Availability
Not Available
Packaged Dimensions
36" x 39" x 36
Packaged Weight
529 lb(s)
UPC Code
Country of Origin
United States